/Engine/Plugins/Protocols/MQTT/Source/MQTTCore/Public/MQTTClientObject.h
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="MQTT") void Connect ( const [FOnConnectDelegate](API\Plugins\MQTTCore\UMQTTClientObject\FOnConnectDelegate) & InOnConnect )